EP1554546B1 - Systeme de mesure de longueur - Google Patents

Systeme de mesure de longueur Download PDF

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Publication number
EP1554546B1
EP1554546B1 EP03769445.2A EP03769445A EP1554546B1 EP 1554546 B1 EP1554546 B1 EP 1554546B1 EP 03769445 A EP03769445 A EP 03769445A EP 1554546 B1 EP1554546 B1 EP 1554546B1
Authority
EP
European Patent Office
Prior art keywords
profile
machine
scale
profile part
machine part
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
EP03769445.2A
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German (de)
English (en)
Other versions
EP1554546A1 (fr
Inventor
Hans-Joachim Freitag
Heinz-Günther Franz
Andreas Schmidt
Ludwig BÖGE
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dr Johannes Heidenhain GmbH
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Dr Johannes Heidenhain GmbH
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Filing date
Publication date
Priority claimed from DE10262008A external-priority patent/DE10262008B4/de
Application filed by Dr Johannes Heidenhain GmbH filed Critical Dr Johannes Heidenhain GmbH
Publication of EP1554546A1 publication Critical patent/EP1554546A1/fr
Application granted granted Critical
Publication of EP1554546B1 publication Critical patent/EP1554546B1/fr
Anticipated expiration legal-status Critical
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G01D5/26—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light
    • G01D5/32—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light
    • G01D5/34—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells
    • G01D5/347—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells using displacement encoding scales
    • G01D5/34746—Linear encoders

Definitions

  • the invention relates to a length measuring system for measuring relative movements between a first and a second machine part, with a scanning head and a scale sensed thereof, wherein in a final assembly of the length measuring the scanning head fixed to the first machine part attachable and the scale with the second machine part is connectable ,
  • the invention further relates to a method for final assembly of such a length measuring system.
  • Length measuring systems for measuring relative movements between a first and a second machine part are known and frequently used in machine tools, for example to detect the movement of a machine head or carriage relative to a machine bed.
  • a scale is used, which is attached to the machine bed.
  • a scanning head senses the scale, which can be done without contact as well as contact.
  • the higher accuracy of measurement, optical and thus contact-free sensing principles have prevailed.
  • Length measuring systems of the type mentioned can be divided into two categories: open and encapsulated measuring systems.
  • open measuring systems the scale is fixed to the machine bed and the scanning head mounted on the machine head moves above the scale.
  • encapsulated measuring systems the scale lies in a closed capsule in which the scanning head is located. The scanning head runs on lying in the capsule guide elements and is connected to a driver with the machine head, so that it moves with this.
  • An encapsulated measuring system is for example in the DE 30 20 003 A1 shown.
  • Encapsulated measuring systems achieve higher protection against contamination of the scale and the scanning head as open systems, but buy this with a high design effort. Encapsulated measuring systems are accordingly more expensive than open ones.
  • An encapsulated length measuring system in which the assignment between the scanning head and the profile is ensured by means of a transport lock is in the DE 199 18 654 A1 described.
  • the DE 35 27 652 A1 discloses an enclosed length measuring system and method for aligning the profile portion of an encapsulated length measuring system.
  • the scanning head is coupled to a movable machine part, which aligns the profile part by means of an assembly jig by relative movement in the measuring direction.
  • the scanning head In open systems, the scanning head is usually fixedly mounted on the machine head, this flexibility is not given, which is why a higher accuracy of the mutual position of the mounting surfaces for scanning head and scale is required. This complicates the final assembly.
  • the DE 199 14 311 A1 shows such an open length measuring system with a device for the directed attachment of a scale or a scale carrier to a mounting surface.
  • the invention has for its object to provide a length measuring system in which a simple assembly is possible. Next, an improved protection of the scanning head and scale should be achieved with reduced technical complexity.
  • a length measuring system for measuring relative movements between a first and a second machine part, with a scanning head and a scale sensed therefrom, wherein in a final assembly of the length measuring system the scanning head fixed to the first machine part attachable and the scale is connectable to the second machine part, solved, in which the scale is mounted in a profile part, which is fixedly mounted in the final assembly on the second machine part and in which the scanning head, wherein the scanning head is pre-adjusted in a prepared for final assembly state via a removable mounting member and releasably connected to the profile part or the scanning head in the final assembled state in the profile part, without supporting it.
  • the profile part is aligned and fixed to the second machine part for final assembly, the scanning is fixedly attached to the first machine part gap filling and then to release the connection of profile and scanning the mounting element is removed.
  • a profile part which not only has protective functions for the scale, but also surrounds the scanning head, in particular in the area in which optical elements lie.
  • the scanning head is fixedly mounted on the machine part, so that it does not require a guide contact with the profile part.
  • the profile part can therefore be made simpler in this regard and does not have to lead the scanning head. This follows only the movement of the first machine part to which it is firmly attached.
  • the orientation of the scanning head and scale is achieved in the assembled state by appropriate adjustment of the profile part containing the scale to the scanning head.
  • the predetermined movement between the first machine part, which carries the scanning head, and the scale-carrying profile part, which is fixed to the second machine part, automatically ensures in the final assembled state for the correct position between the scanning head and scale, as required for an accurate measurement.
  • this adjusted condition Prior to final assembly, this adjusted condition is secured by a removable mounting member which removably connects the scanning head to the profile member.
  • the attachment of the profile part on the second machine part is carried out in the inventive length measuring expediently when the scanning head and profile part are still connected.
  • positive or cohesive connections come into question, wherein a cohesive connection in the form of a bond has the advantage that it can be made by untrained personnel in attaching the length measuring on a machine. It is therefore preferred that the profile part has an adhesive surface on which it is glued to the second machine part.
  • the profile part protects the scale. Furthermore, it also has a certain protective function for the scanning head.
  • the profile part is profiled in a U-shape with two legs, wherein one of the legs is attached to the second machine part and carries on its inside the scale and the other of the legs surrounds the scanning without contact during the measurement.
  • the scale contactless encompassing readhead is usually deep into the profile part, whereby it is particularly well protected.
  • the exposed optical components of the scanning head are then preferably in the profile part. This reduces the risk of mechanical damage to the scanning head.
  • the risk of contamination for the scale is greatly reduced because it is located inside the U-shaped profile part and in a measuring gap of the scanning head.
  • the profile part is formed in this embodiment in the manner of a capsule profile or a U-shaped rail in the interior of the scale sits.
  • the scanning head can be easily connected to the profile part by a connection between the two legs of the profile part and the scanning head is established.
  • This betechnikstelligende mounting elements also have the advantage that the scale lying in the interior of the profile part of the mounting element, which ensures the pre-aligned state, can not be affected.
  • a particularly simple yet highly accurate trained mounting element is in the form of two cylindrical cross-section spacers, which are stretched by the legs of the profile part in grooves of the scanning head.
  • Such spacers can then be removed without tools in a simple manner by pulling out to release the connection between the scanning head and profile part. Due to the cross section of the spacers and the force exerted by the profile part clamping force can about
  • the desired adjustment between the scanning head and profile part can be set very precisely.
  • the profile part is fastened in a preferred embodiment directly on the second machine part.
  • the location of the scale in the profile part is thus crucial for the orientation of the scale to the second machine part.
  • a high-precision alignment of the scale in the profile part is thus conducive to the measurement accuracy.
  • the profile part has a scale-aligning reference surface against which the scale rests in the fastened state.
  • a particularly accurate alignment is achieved when using two reference surfaces which are at an angle to each other (preferably 90 °). The reference surfaces align the scale in the profile part.
  • a tensioning device which braces the scale in the direction of the reference surface.
  • a tensioning device is for example a spring device or a suitable elastic means, such as a rubber cord in question.
  • the scanning head is protected by the standing in the profile part from dirt. He feels the lying in the profile part scale contactless.
  • the scanning head which projects into the profile part surrounds the scale fixed there in three sides and without contact during the measurement.
  • the length measuring system according to the invention is particularly easy to assemble by first the profile part is aligned and fixed to the second machine part and then the scanning head is attached to the second machine part gap filling.
  • the orientation of the profile part should be such that under the relative movement of the first and second machine part, the predetermined adjustment between the scanning head and scale is maintained when the scanning head is guided by the first machine part.
  • the orientation of the profile part along the longitudinal axis of the relative movement, i. at a constant distance from the first machine part is essential for ensuring that the scanning head to be mounted on the first machine part and the scale always have the ideal length which causes the smallest possible measuring error. It is therefore preferred for mounting that the profile part is roughly aligned to the longitudinal axis of the relative movement and then adjusted by means of a teaching along the longitudinal axis at a constant distance from the first machine part, wherein the first and second machine part to Einjust réelle the constant distance are moved against each other. This procedure ensures that the scanning head is always in a predetermined position to the scale even after attachment to the first machine part.
  • the scanning is attached to the first machine part gap filling, it is expedient to set by means of the teaching a predetermined gap between the first machine part and the scanning head before attaching the scanning head on the first machine part.
  • the gap-filling attachment then fills this predetermined gap and any deviations caused by tolerances.
  • a measuring system with a trained as a scanning head component which can be fastened with a mounting surface using an adhesive to a machine part and which has a mounting plate which is releasably attachable to the machine part and limits the mounting surface with an adhesive volume, in which the adhesive can be filled from above, wherein the adhesive volume is bounded at the bottom and each sealed at the sides between the component and mounting plate for the adhesive.
  • the object is further achieved by a method for securing the component of such a measuring system on the machine part, wherein the component is adjusted to a predetermined position on the machine part and fixed there, solved by that after adjusting in the predetermined position, the mounting plate firmly on Attached machine part and then glue is filled into the adhesive volume to connect the component firmly to the mounting plate.
  • a mounting plate is used for the measuring system, which is detachably fastened to the machine part and with the mounting surface of the component, for example a scanning head, glued.
  • the tolerance requirements of the mounting surface on the machine part are thus significantly reduced, any deviations which could, for example, a wedge-shaped gap on the mounting surface of the scanning head result, are compensated by the bond.
  • the adhesive volume formed between the mounting plate and the mounting surface allows a gap-filling attachment of the component to the machine part, so that the attachment of the component has no negative impact on its adjusted position; This particular, since the attachment can be done stress-free by filling the adhesive volume with adhesive.
  • the mounting plate on the measuring system beyond a defined material pairing between mounting plate on the one hand and mounting surface on the other hand guaranteed.
  • the quality of the bond is thereby increased.
  • a greater freedom in the choice of the adhesive is given, and the adhesive volume can be optimally designed in terms of design and size for an adhesive.
  • the mounting plate is detachably attached to the machine part. It is thus possible to detach the component even after the bonding of the machine part. With a bond without a mounting plate, this would not be possible.
  • a particularly simple seal can be achieved if the mounting plate or the mounting surface of the component has a protruding structure which seals the adhesive volume between the mounting surface and the mounting plate.
  • the mounting surface of the component is approximately rectangular.
  • the projecting structure that reaches the seal is U-shaped. Then the adhesive can be filled in at the top of the "U".
  • the sealing boundary of the adhesive volume must be ensured even with variations of the gap between the mounting plate and mounting surface. Such variations may be due to tolerances with respect to the mounting surface on the machine part.
  • elastic sealing means which still act sufficiently sealing for the adhesive even with a certain variation of the adhesive gap, conceivable.
  • a particularly large insensitivity to adhesive gap variations can be achieved by a recess on the mounting surface or the mounting plate, in which the above structure stands for sealing. With this design particularly large tolerances can be allowed for the mounting surface on the machine part.
  • the above structure is a sealant, such as a metal bar, a metallic or non-metallic, in particular an elastomeric seal.
  • a good attachment for such a sealant results when a recess is provided, in which the sealant is inserted. It is therefore preferable in this respect that the above structure has a sealant inserted in a recess.
  • the filling of the adhesive into the gap forming the adhesive volume takes place from above into the adhesive volume, which in most cases will be designed as a gluing bag.
  • the mounting plate has a filling hopper feeding the adhesive volume from above.
  • this Einyogllichter cooperates with an inlet slope on the component, so that by simply filling the entire amount of adhesive passes directly into the adhesive volume.
  • the detachable attachment of the mounting plate allows, as already mentioned, a subsequent removal of the component from the machine part.
  • any positive or non-positive connection comes into question.
  • the mounting plate has releasable fasteners on the machine part outside the volume one or more mounting holes.
  • the component e.g. a scanning head of a length measuring system
  • the machine part such as a machine head of a machine tool.
  • the thickness of the mounting plate must be considered. It is advantageous in this regard, if the mounting plate is held on the mounting surface during Einjust Schlierens on the component. The same applies to the transport of a component of a measuring system to final assembly. It is therefore preferred that the measuring system has holding means, which serve in particular as a transport lock and with which the mounting plate is removably held on the component.
  • the measuring system can be easily attached to the machine part by first adjusting the component, then attaching the mounting plate and then the bonding between the mounting plate and component is made. This ensures a stress-free assembly of the component, whereby the adjusted position remains securely in the final assembly.
  • This mounting method is particularly simple when the mounting plate is already held on the mounting surface of the component during the adjustment of the component. It then only has to be attached to the mounting plate on the machine part. The after adjusting the adjusted position between the mounting plate and machine part existing gap is thereby displaced between the mounting plate and the mounting surface of the component, so that there is the desired adhesive gap for the adhesive volume or the adhesive pocket.
  • FIG. 1 shows a sectional view through a scale 1 of a length measuring system, which is used on a machine tool to detect the relative movement of a machine head relative to a machine bed.
  • the scale 1 is inserted into a capsule profile 2, which surrounds the scale 1 for protection on three sides.
  • a receptacle 3 is provided for attaching the scale 1, in which the scale 1 is used (arrow 4).
  • a rubber cord 5 is inserted, which acts as a tensioning means to secure the scale 1 in the receptacle 3. Since the scale 1 is sensed later in the measuring process (he has a suitable structuring on this) and its location is important for an accurate measurement, the receptacle 3 has a lower reference surface 6 and a lateral reference surface 7, the scale 1 in more detail Align the position in the capsule profile 2 when the rubber cord 5 acting as a clamping device presses the scale 2 onto the reference surfaces.
  • the capsule profile 2 has a U-shaped cross section with a base 8 and a lid 9. Because the capsule profile 2 surrounds the scale 1 on three sides, a good protection of the sensitive scale 1 is given. The sensed structure of the scale 1 is due to the inclined surface of the scale 1 facing downwards in the installation position, whereby dust deposits are further reduced.
  • the base 8 of the capsule profile 2 is designed for attachment to the machine bed of a machine tool.
  • FIG. 2 shows the scale 1 installed in the capsule profile 2. It is easy to see that the scale 1 in the capsule profile 2 is accessible only through an opening 10.
  • the opening 10 is a slot, as the scale 1 extends perpendicular to the plane of the drawing, as well as the capsule profile 2, which is made of a suitably profiled aluminum strand, for example.
  • the legs of the capsule profile 2, ie the base 8 and the cover 9, have retaining grooves, so that an upper retaining groove 11 is formed in the cover 9 and a lower retaining groove 12 is formed in the base 8.
  • These retaining grooves 11, 12 serve in combination with a certain elasticity of the lid. 9 for securing a scanning head inserted in the capsule profile, which will be explained later.
  • the scanning head 13 is in FIG. 3 shown schematically. It has a measuring gap 14 which in the assembled state surrounds scale 1 on three sides without contact and on which the measuring means (not shown) are arranged, which sense the structure (also not shown) on scale 1 in a contactless manner.
  • the scanning head 13 has a mounting surface 15, with which it is firmly attached to the machine head of the machine tool.
  • the scanning head 13 has an upper groove 16 and a lower groove 17 which cooperate with the retaining grooves 11 and 12 in the legs of the capsule profile 2 so that a transport safety assembly of assembled capsule profile 2 with scale 1 and scanning head 13 is ensured, the Scanning head 13 and the scale 1 are secured to each other in a predetermined, adjusted position.
  • an upper fitting cylinder 18 and a lower fitting cylinder 19 are provided, whose diameter is such that they are in the upper holding groove 11 and the lower holding groove 12 inserted by the resilient action of the lid 9 in the groove 16 and 17 are fixed when the Scanning head 13 is inserted into the capsule profile 1.
  • the fitting cylinders 18 and 19 may be formed, for example, as suitable steel wires.
  • the insertion process is in FIG. 3 represented schematically by an arrow, wherein, of course, after the assembly of scale 1 and capsule profile 2, threading of the scale 1 into the measuring gap 14 of the scanning head 13 takes place by a movement perpendicular to the plane of the drawing. That is, the scanning head 13 is slid over the scale 1 at an open end of the capsule profile 2. Thereafter, the fitting cylinder 18 or 19 is inserted into the gap formed by the upper retaining groove 11 and the upper groove 16 and in the gap formed by the lower retaining groove 12 and the lower groove 17. Due to the resilient action of the lid 9 forming leg of the capsule profile 2, the mating cylinder are clamped. The capsule profile 2 holds the scanning head 13 firmly between the base 8 and the lid 9, and there is a predetermined, given within narrow, exactly measured tolerances orientation of the scanning head 13 to scale 1 given.
  • the thus preassembled unit of scanning head 13, capsule profile 2 and scale 1 can then be easily mounted on the machine by the scanning head 13 and capsule profile 2 are attached to the machine head or machine bed.
  • this attachment according to the in the FIGS. 4 to 7 illustrated steps.
  • the figures show a plan view of the preassembled unit of capsule profile 2, scale 1 and scanning head 13 from above (based on FIG. 3 ).
  • the scanning head 13 is provided for attachment to the mounting surface 15 with a mounting plate 22, whose construction will be explained later in detail.
  • About the mounting plate 22 of the scanning 13 is mounted on the machine part 21.
  • the mounting plate 22 must not be provided on the scanning head 13 when attaching the capsule profile 2. It will, as will be explained, only needed for the fixed attachment of the scanning head 13 on the machine head 21.
  • the capsule profile 2, inside which the (in the FIGS. 4 to 7 not visible) scale 1 is exactly parallel to the machine sequence, ie aligned to the longitudinal movement of the machine head 1.
  • an assembly jig 20 is used, which aligns the capsule profile 2 in a predetermined distance D to the machine head 21.
  • FIG. 5 shows this process in which the machine head 21 with mounting jig 20 causes the alignment of the capsule profile 2.
  • the adjusted capsule profile 2 is attached to the machine bed.
  • the attachment can be done in many ways.
  • a two-stage process is used in which first a coarse alignment of the capsule profile 2 to the machine sequence takes place.
  • the machine head 21 is moved to the corresponding (end) positions and the capsule profile is aligned with two as far as possible points apart with the mounting jig 20.
  • a first fixation of the capsule profile 2 can take place, for example by loosely tightening a screw connection.
  • the machine head 21 is moved slowly along the machine cycle with the assembly jig 20 and at the same time the capsule profile 2 is firmly fixed to the machine bed (not shown).
  • This can be achieved by firmly tightening the screw in an embodiment in which the capsule profile 2 is screwed.
  • the gluing can be performed stepwise, for example by removing a suitable double-sided adhesive tape attached to the base 8 of the capsule profile 2 with the advancing movement of the machine head 21 from a protective sheet, so that the capsule profile 2 is glued firmly to the machine bed.
  • the scanning head 13 with the mounting plate 22 attached thereto is as described FIG. 3 has been described, connected by the fitting cylinder 18 and 19 fixed to the capsule profile 2.
  • the orientation of the capsule profile 2 parallel to the outlet of the machine head 21 thus has no influence on the pre-adjusted position of capsule profile 2 with scale 1 to the scanning head 13th
  • the machine head 21 is moved to the scanning head 16. It turns here between the mounting plate 22, which rests against the mounting surface 15 of the scanning head 13, and the machine head 21, a predetermined gap 45 a. Now, the mounting plate 22, which was previously secured to the scanning head 13, released from this and bolted to the machine part 21. As a result, the gap 45, which previously existed between the mounting plate 22 and machine part 21, displaced between the mounting plate 22 and the scanning head 13. This gap serves as an adhesive gap 30, which is then filled with adhesive to the mounting head 13 fixed to the mounting part 21 bolted mounting plate 22 to install (see FIG. 7 ). The adhesive can harden stress-free.
  • connection between the mounting head 13 and capsule profile 2 is achieved by the fitting cylinders 18 and 19 are pulled out of the columns formed by the upper retaining groove 11 and upper groove 16 and lower retaining groove 12 and lower groove 17.
  • FIG. 8 shows a sectional view through the mounting jig 20. It is placed over the capsule profile 2 and has for this purpose a first reference arm and a second reference arm 24.
  • the reference arm 24 has, on its side facing the capsule profile 2, a reference surface 25 which bears against the outside of the capsule profile 2 approximately at the level of the scale 1.
  • a support surface 27 which is located on the inside of the first reference arm 23 facing the capsule profile 1, the assembly jig 20 rests on the lid 9 of the capsule profile 2.
  • An adjusting arm 26 of the jig 20 ensures that, when the jig 20 is mounted on the capsule profile desired distance D is given to the machine head 21.
  • the adjustment arm 26 thus stands between the free ends of the capsule profile 2 and the machine part 21.
  • FIG. 9 shows in a sectional view the state of attachment of the measuring system, as in FIG. 7 can be seen in plan view.
  • the capsule profile 2 is glued with its base 8 on the machine bed 28, to which an adhesive tape 29 is used with predetermined properties.
  • the mounting plate 22 is (on in FIG. 9 not shown) firmly attached to the machine head 21, wherein the gap dimension D, which was predetermined by the mounting jig 20, a predetermined adhesive gap 30 between the mounting surface 15 of the Scanning head 13 and the mounting plate 22 causes.
  • the mounting plate 22 has at the bottom a projecting edge projection which limits the adhesive gap 30 down.
  • FIG. 10 shows the measuring system after completion of the assembly, wherein the adhesive tape 29 is not shown for simplicity.
  • the adhesive gap 30 was filled with adhesive 31, which could not run out of the adhesive gap 30 because of the edge projection 32 on the underside of the mounting plate 22.
  • the scanning head 13 is free along the (Placed perpendicular to the plane of the plane) flow direction of the machine head 21 movable.
  • the scanning head 13 stands in the capsule profile 2 and is surrounded by this contactless three-sided. As a result, a good protection of the scanning head 13 against contamination or mechanical damage is achieved.
  • the scanning head 13 in turn surrounds the scale 1 on three sides and senses this contactlessly. Due to the orientation of the capsule profile 1 and scanning head 13 no guidance of the scanning head 13 in the capsule profile 2 is required. The scanning head 13 is not supported on the capsule profile 2 or scale 1.
  • FIG. 11 shows a perspective view of an embodiment of the mounting plate 22, wherein that side in the image to the right, to which the scanning head 13 is attached to the mounting surface 15.
  • the mounting plate 22 has a U-shaped peripheral edge projection 32, which serves as a sealant to prevent leakage of the adhesive, which is filled by a formed at the top between the scanning head 13 and the mounting plate 22 opening 34 to the scanning head 13 at to glue the mounting plate 22.
  • the mounting plate 22 has a hopper 35 with a filling opening 36 into which adhesive can be injected from a grommet.
  • the mounting plate 22 also has two slots 37, which allow to screw the mounting plate 22 on the machine part 21. This screw connection can be solved if the scanning head 13 is to be accepted again by the machine head 21 after bonding has taken place. Without this detachable connection between the mounting plate 22 and the machine head 21, a removal of the scanning head after bonding would only be very complicated and with a risk of damage to the machine head 21 possible.
  • One of the elongated holes 27 lies in a flange 38, whereby a particularly good accessibility is achieved even after bonding of the scanning head 13.
  • the formation of the holes as slots 37 also has the advantage that in the corresponding Threaded holes on the machine head 21 larger tolerances can be allowed without any impact on the exact assembly of the scanning would be feared.
  • the mounting plate 22 In order to secure the mounting plate 22 on the scanning head 13 until the mounting of the mounting plate 22 and the subsequent bonding of the scanning head 13 are completed, the mounting plate 22 has suitable retaining lugs 39 which engage in corresponding holding openings on the scanning head 13. As a result, the mounting plate 22 can be placed on the scanning head 13 and is secured until the end of the attachment against falling.
  • the holding openings 42 are on the scanning head 13 in the perspective view of FIG. 12 Good to see that shows the mounting head 13 in a perspective view of the mounting surface 15 ago.
  • a U-shaped recess 40 is provided on the mounting surface 15, into which the edge projection 32 of the mounting plate 22 so that a formed between the mounting plate 22 and mounting surface 15 adhesive space 33, which serves to receive the adhesive 31, below and is laterally sealed. Due to the viscosity of the adhesive used, a simple abutment of the edge projection 32 on the vertical wall surface, which is formed by the recess 40, is sufficient to achieve the desired sealing effect.
  • the scanning head 13 has for easier filling of the adhesive 31 in the adhesive space 33 via inlet slopes 42.
  • the inlet slopes 42 are such that in the hopper 35 filled adhesive runs over the inlet slope 42 in the adhesive space 33.
  • FIG. 13 shows FIG. 13 in which the mounting plate 22 is shown fastened via screws 42 on the machine part 21 (not shown).
  • a spout 44 is inserted, which serves to introduce adhesive via the inlet slope 42 in the adhesive space 33 for bonding the scanning head 13 to the mounting plate 22.
  • the U-shaped peripheral edge 32 of the mounting plate 22, which protrudes into the recess 40 on the mounting surface 15 of the scanning head 13, ensures that the introduced adhesive can not escape from the adhesive space 33 down or laterally.
  • the scanning head 13 is secured during the bonding by the capsule profile 2 in the adjusted position to the machine part 21 (not shown).
  • the capsule profile 2 is, however, for better clarity in FIG. 13 not shown.
  • FIG. 14 shows the state after bonding just before completion of the final assembly, now the capsule profile 2 together with scale 1 is shown.
  • the scanning head 13 is deeply in the capsule profile 2 a.
  • the scanning head 14 surrounds the scale 1 on three sides, without this to rest or support itself, when the final assembly is completed, so the fittings were removed.
  • the upper fitting cylinder 18 is in FIG. 14 already pulled out of the upper retaining groove 11 and the (hidden in the representation) upper groove 16 of the scanning head 13, the lower fitting cylinder 19 but not yet.
  • After removal of the lower fitting cylinder 19 from the lower retaining groove 12 and the lower groove 17 of the scanning head 14 attached to the machine head 21 is freely movable along the scale 1, wherein the movement pattern is predetermined by the movement of the machine head 21.
  • the screws 43 can be rotated, whereby the scanning head 13 together with the mounting plate 22 from the machine head 21 is removable.

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Claims (8)

  1. Système de mesure de longueur pour mesurer des mouvements relatifs entre une première et une deuxième partie de machine (21, 28), comprenant une tête de balayage (13) et une échelle de mesure (1) balayée par celle-ci, la tête de balayage (13) pouvant être montée fixement sur la première partie de machine (21) dans un montage final du système de mesure de longueur et l'échelle de mesure (1) pouvant être connectée à la deuxième partie de machine (28) et l'échelle de mesure (1) étant portée par une partie profilée (2) et pouvant être montée fixement sur la deuxième partie de machine (28) dans le montage final,
    le système de mesure de longueur présentant un gabarit de montage (20) avec lequel la partie profilée (2) peut être orientée par mouvement relatif de la première et de la deuxième partie de machine (21, 28) et application simultanée du gabarit de montage (20) contre la partie profilée (2) à une distance prédéterminée (D) par rapport à la première partie de machine (21) et le long de l'axe longitudinal du mouvement relatif, et
    le système de mesure de longueur présentant en outre un élément de montage (18, 19) qui, pendant l'orientation, garantit une connexion rigide entre la tête de balayage (13) et la partie profilée (2) dans un état préajusté, ladite connexion rigide pouvant être desserrée après l'orientation correcte en conservant l'état préajusté.
  2. Système de mesure de longueur selon la revendication 1, caractérisé en ce que le gabarit de montage (20) présente un bras d'ajustement (26), qui est situé entre la partie profilée (2) et la première partie de machine (21) et qui ajuste la distance prédéterminée (D).
  3. Système de mesure de longueur selon la revendication 2, caractérisé en ce que le gabarit de montage (20) a une section transversale en forme de U, présente un premier bras de référence (24) opposé au bras d'ajustement (26), qui dispose d'une surface de référence (25) sur son côté tourné vers la partie profilée (2), laquelle surface de référence est réalisée de manière à s'appliquer à l'extérieur contre la partie profilée (2) à hauteur de l'échelle de mesure (1), et un deuxième bras de référence (23) reliant le premier bras de référence (24) au bras d'ajustement (26), au niveau du côté intérieur duquel deuxième bras de référence, tourné vers la partie profilée (2), est formée une surface d'appui (27) qui est formée de manière à s'appuyer sur un couvercle (g) de la partie profilée (2), de telle sorte que lorsque le gabarit de montage (20) est monté sur la partie profilée (2), le bras d'ajustement (26) soit réalisé de manière à se situer entre les extrémités libres de la partie profilée (2) et de la première partie de machine (21).
  4. Procédé pour le montage final d'un système de mesure de longueur selon la revendication 1 ou 2, caractérisé en ce que pour le montage final, la partie profilée (2) est orientée par rapport à la deuxième partie de machine (28) au moyen d'un gabarit de montage (20) à une distance prédéterminée (D), le gabarit de montage (20) s'appliquant contre la partie profilée (2) et la première partie de machine (21), et la partie profilée (20) étant orientée par mouvement relatif de la première et de la deuxième partie de machine (21, 28) le long de l'axe longitudinal du mouvement relatif, et pendant l'orientation, un élément de montage (18, 19) garantissant une connexion rigide entre la tête de balayage (13) et la partie profilée (2) dans un état préajusté, laquelle connexion rigide est desserrée après l'orientation correcte en conservant l'état préajusté.
  5. Procédé selon la revendication 4, caractérisé en ce que la partie profilée (2) est orientée grossièrement par rapport à l'axe longitudinal du mouvement relatif et ensuite est ajustée au moyen du gabarit de montage (20) à la distance constante (D) le long de l'axe longitudinal par rapport à la première partie de machine (21).
  6. Procédé selon la revendication 5, caractérisé en ce que la partie profilée (2) est préfixée après l'orientation grossière et est fixée de manière définitive après l'ajustement.
  7. Procédé selon la revendication 4, 5 ou 6, caractérisé en ce que le gabarit de montage (20) permet d'ajuster une distance (D) qui produit un espacement prédéterminé entre la première partie de machine (21) et la tête de balayage (13) avant le montage de la tête de balayage (13) sur la première partie de machine (28).
  8. Procédé selon l'une quelconque des revendications 4 à 7, caractérisé en ce que la tête de balayage (13) et/ou la partie profilée (2) sont collées sur la partie de machine respective (21, 28).
EP03769445.2A 2002-10-25 2003-10-23 Systeme de mesure de longueur Expired - Fee Related EP1554546B1 (fr)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE10249884 2002-10-25
DE10262008A DE10262008B4 (de) 2002-10-25 2002-10-25 Längenmeßsystem
DE10262008 2002-10-25
DE10249884A DE10249884B4 (de) 2002-10-25 2002-10-25 Geschütztes Längenmeßsystem
PCT/EP2003/011760 WO2004038339A1 (fr) 2002-10-25 2003-10-23 Systeme de mesure de longueur

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EP1554546B1 true EP1554546B1 (fr) 2013-06-05

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EP1752742B1 (fr) 2005-08-12 2015-03-11 Dr. Johannes Heidenhain GmbH Capteur pour système de mesure de longueur et son procédé de montage

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DE3527652A1 (de) * 1984-08-02 1986-02-06 Sokkisha Co., Ltd., Tokio/Tokyo Befestigungsmechanismus fuer ein messsystem mit magnetskala
DE19914311A1 (de) * 1999-03-29 2000-10-05 Heidenhain Gmbh Dr Johannes Verfahren und Vorrichtung zum Anbringen eines Maßstabes

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DE3020003C2 (de) 1980-05-24 1983-01-27 Dr. Johannes Heidenhain Gmbh, 8225 Traunreut Sicherungsvorrichtung für Transport und Montage einer Meßeinrichtung
DE8616206U1 (de) * 1986-06-16 1986-07-31 RSF-Elektronik Gesellschaft m.b.H., Tarsdorf Gekapselte Längenmeßeinrichtung
DE4017858A1 (de) * 1990-06-02 1991-12-12 Heidenhain Gmbh Dr Johannes Gekapselte messeinrichtung
DE19918654B4 (de) 1999-04-16 2004-07-15 Dr. Johannes Heidenhain Gmbh Sicherungsvorrichtung für den Transport und die Montage einer Meßeinrichtung
DE10056947A1 (de) * 2000-11-17 2002-05-23 Optolab Licensing Gmbh Verfahren und Anordnung zur Montage von Messsystemen
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DE3527652A1 (de) * 1984-08-02 1986-02-06 Sokkisha Co., Ltd., Tokio/Tokyo Befestigungsmechanismus fuer ein messsystem mit magnetskala
DE19914311A1 (de) * 1999-03-29 2000-10-05 Heidenhain Gmbh Dr Johannes Verfahren und Vorrichtung zum Anbringen eines Maßstabes

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WO2004038339A1 (fr) 2004-05-06
AU2003278131A1 (en) 2004-05-13
DE10249884B4 (de) 2010-11-18
DE10249884A1 (de) 2004-05-13

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